How to Find the Right Size Storm Door
Now, all storm doors mount to the exterior trim on your entry door. The exterior trim must be wood in order for a proper installation. Oftentimes, the most common type of exterior trim used is called “brick-molding.” Why it’s called brick-molding I have no idea; it’s made of wood. Other times, you may have 1″ x 4″ cedar trim or something similar. No matter, what you are looking for is that there is a flat surface of at least 1″ to mount the storm door frame to and that the depth of the material is at least 1″ as well.
Once you have determined that you have a proper surface to mount the door to, now it is time to measure the opening.
- At the TOP,
- At the MIDDLE, and
- At the BOTTOM of the opening.
Write down or remember each measurement and make a note of the SMALLEST measurement. Now you are going to measure the height from the threshold to the top, and in 3 places:
- On the LEFT side,
- In the MIDDLE, and
- On the RIGHT side of the opening.
Once again write down or remember each measurement and make a note
of the SMALLEST measurement.
Now, write down your two smallest measurements as width X height. If you get confused, write down the smaller of the 2 smallest measurements first; this is the door width. The remaining number of the 2 is the door’s height.
Now you have the actual door opening size. You may refer to the tables below to find out which manufacturer’s door sizes can fit your opening.
And now that you have properly measured your door opening, you are ready for the next step: Install a Storm Door
Larson Doorway Opening Size Guide
Andersen and Emco Doorway Opening Size Guide
Video Instructions for Measuring a Storm Door